Income Taxes - Reconciliation of our uncertain tax positions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in unrecognized tax benefits
Balance as of January 1	$ 26,704	$ 25,770	$ 25,711
Additions for tax positions of prior years	19,760	1,887	1,003
Reductions for tax positions of prior years	(476)	(953)	(860)
Settlements			(84)
Balance as of December 31	45,988	26,704	25,770
Interest and penalties on unrecognized tax benefits	14,400	7,600	7,700
Liability related to unrecognized tax benefit for accrued interest and penalties	$ 6,900	$ (600)	$ 800